3 – 9 Jun 2026 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

Modelled US AQI · 8 cities · CAMS via Open-Meteo

44.3Weekly mean modelled AQI · Good

Mean PM2.5: 8.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-12.2 AQI compared with the previous week’s mean of 56.5.

Highest hourly estimate: 135 in Khon Kaen · 3 Jun, 17:00 GMT+7.

1344 of 1344 city-hours have a modelled AQI. These are estimates for roughly 45 km model grid cells, not monitoring-station measurements. How this report is made

Daily modelled US AQI

Day	Mean AQI	Low–high	Mean PM2.5 (µg/m³)	City-hours
Wed, 3 Jun	51Moderate	24–135	10.7	192 / 192
Thu, 4 Jun	45.9Good	18–73	9.1	192 / 192
Fri, 5 Jun	42.3Good	25–82	7.7	192 / 192
Sat, 6 Jun	40.6Good	22–72	7.8	192 / 192
Sun, 7 Jun	39.7Good	20–63	7.6	192 / 192
Mon, 8 Jun	43Good	18–63	8.6	192 / 192
Tue, 9 Jun	47.4Good	20–66	10.4	192 / 192

Hourly means (UTC+7)

Each cell averages the selected cities’ modelled AQI for that hour.

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	50	50	49	49	49	49	49	49	49	49	49	49	49	51	53	56	57	58	58	55	52	50	49	48
Thu	48	48	47	47	47	46	46	46	46	45	45	45	45	45	46	46	46	47	47	46	46	45	45	45
Fri	44	44	44	44	43	42	42	41	41	41	41	41	41	41	41	41	42	44	45	45	44	43	41	40
Sat	40	40	39	39	39	39	39	38	39	39	39	40	40	40	41	41	41	42	44	45	44	43	42	42
Sun	41	41	41	40	41	40	41	40	40	39	39	38	38	38	38	39	40	40	41	41	40	40	40	40
Mon	40	40	40	40	41	41	41	41	42	43	43	44	44	44	45	45	45	45	45	45	45	45	45	45
Tue	45	45	45	45	45	46	46	46	46	47	47	47	47	48	48	48	49	49	49	50	50	50	50	50

Cities by modelled US AQI

Sorted by weekly mean. Each city is a single model grid cell near its centre.

City	Mean AQI	Peak AQI	Mean PM2.5 (µg/m³)	Hours
Khon Kaen	59.5Moderate	135	13.2	168 / 168
Chiang Rai	57.3Moderate	82	12.9	168 / 168
Chiang Mai	47.7Good	64	9	168 / 168
Nakhon Ratchasima	45.6Good	59	9	168 / 168
Hat Yai	43.4Good	72	8.9	168 / 168
Phuket	38.4Good	54	7.3	168 / 168
Bangkok	35.5Good	66	6.3	168 / 168
Pattaya	26.9Good	38	4	168 / 168

City-hours by category

Good: 802

Moderate: 535

Unhealthy for Sensitive Groups: 7

Unhealthy: 0

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQI	Category
0–50	Good
51–100	Moderate
101–150	Unhealthy for Sensitive Groups
151–200	Unhealthy
201–300	Very Unhealthy
301+	Hazardous

How this report is made

Open-Meteo provides hourly estimates from the Copernicus Atmosphere Monitoring Service (CAMS) global model at roughly 45 km resolution. We use the grid cell nearest each city’s centre. Nearby places may share a cell, and local pollution can differ.

The AQI is the provider’s modelled US AQI across pollutants, one value per city per hour. Weekly, daily and hourly means average those values across the selected cities. PM2.5 is a concentration in µg/m³. These figures use a different basis from the measured PM2.5-derived AQI in the Malaysia and Singapore reports.

Days and hours use UTC+7. The report includes past model hours only, never forecasts. The previous-week comparison appears only when at least 90% of that week’s city-hours are available.

For official local readings and advice, visit Pollution Control Department · Air4Thai. Air-quality data: Open-Meteo and CAMS, licensed under CC BY 4.0. Haze Monitor is independent of these providers and local authorities.

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	50	50	49	49	49	49	49	49	49	49	49	49	49	51	53	56	57	58	58	55	52	50	49	48
Thu	48	48	47	47	47	46	46	46	46	45	45	45	45	45	46	46	46	47	47	46	46	45	45	45
Fri	44	44	44	44	43	42	42	41	41	41	41	41	41	41	41	41	42	44	45	45	44	43	41	40
Sat	40	40	39	39	39	39	39	38	39	39	39	40	40	40	41	41	41	42	44	45	44	43	42	42
Sun	41	41	41	40	41	40	41	40	40	39	39	38	38	38	38	39	40	40	41	41	40	40	40	40
Mon	40	40	40	40	41	41	41	41	42	43	43	44	44	44	45	45	45	45	45	45	45	45	45	45
Tue	45	45	45	45	45	46	46	46	46	47	47	47	47	48	48	48	49	49	49	50	50	50	50	50

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	50	50	49	49	49	49	49	49	49	49	49	49	49	51	53	56	57	58	58	55	52	50	49	48
Thu	48	48	47	47	47	46	46	46	46	45	45	45	45	45	46	46	46	47	47	46	46	45	45	45
Fri	44	44	44	44	43	42	42	41	41	41	41	41	41	41	41	41	42	44	45	45	44	43	41	40
Sat	40	40	39	39	39	39	39	38	39	39	39	40	40	40	41	41	41	42	44	45	44	43	42	42
Sun	41	41	41	40	41	40	41	40	40	39	39	38	38	38	38	39	40	40	41	41	40	40	40	40
Mon	40	40	40	40	41	41	41	41	42	43	43	44	44	44	45	45	45	45	45	45	45	45	45	45
Tue	45	45	45	45	45	46	46	46	46	47	47	47	47	48	48	48	49	49	49	50	50	50	50	50

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	50	50	49	49	49	49	49	49	49	49	49	49	49	51	53	56	57	58	58	55	52	50	49	48
Thu	48	48	47	47	47	46	46	46	46	45	45	45	45	45	46	46	46	47	47	46	46	45	45	45
Fri	44	44	44	44	43	42	42	41	41	41	41	41	41	41	41	41	42	44	45	45	44	43	41	40
Sat	40	40	39	39	39	39	39	38	39	39	39	40	40	40	41	41	41	42	44	45	44	43	42	42
Sun	41	41	41	40	41	40	41	40	40	39	39	38	38	38	38	39	40	40	41	41	40	40	40	40
Mon	40	40	40	40	41	41	41	41	42	43	43	44	44	44	45	45	45	45	45	45	45	45	45	45
Tue	45	45	45	45	45	46	46	46	46	47	47	47	47	48	48	48	49	49	49	50	50	50	50	50